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[lwip-users] lwip init and handling
From: |
Bernhard 'Gustl' Bauer |
Subject: |
[lwip-users] lwip init and handling |
Date: |
Wed, 23 Feb 2005 09:57:54 +0100 |
User-agent: |
Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) |
Hi,
I'm new to lwip and a bit unsure how to do it. I don't have a hw yet so
I can do no tests at the moment.
I don't have a system and I want to use dhcp. My lwipopts.h:
--------------------------------------------
#define MEM_ALIGNMENT 4
#define LWIP_DHCP 1
#define LWIP_NOASSERT
#define NO_SYS 1
--------------------------------------------
My init process look like this:
--------------------------------------------
raw_init();
etharp_init();
cs8900if_init(ð0);
eth0.hwaddr[0] = 0x00;
eth0.hwaddr[1] = 0x01;
eth0.hwaddr[2] = 0x02;
eth0.hwaddr[3] = 0x03;
eth0.hwaddr[4] = 0x04;
eth0.hwaddr[5] = 0x05;
mem_init();
memp_init();
pbuf_init();
netif_init();
ip_init();
udp_init();
tcp_init();
IP4_ADDR(&gw, 192,168,0,1);
IP4_ADDR(&ipaddr, 192,168,0,2);
IP4_ADDR(&netmask, 255,255,255,0);
netif_add(ð0,&ipaddr,&netmask, &gw, NULL, cs8900if_init,ip_input);
netif_set_default(ð0);
--------------------------------------------
Did I forget something or is it in wrong order?
To handle the packets I wrote this function which is call periodically
from the main loop:
--------------------------------------------
void handle_eth(void) {
cs8900if_service(ð0);
if (timer_250ms==1) {
timer_250ms=0;
tcp_tmr(); // every 250ms
}
if (timer_500ms==1) {
timer_500ms=0;
dhcp_fine_tmr(); // every 500 ms
}
if (timer_5s==1) {
timer_5s=0;
etharp_tmr(); // every 5s
}
if (timer_60s==1) {
timer_60s=0;
dhcp_coarse_tmr(); // every 60s
}
}
--------------------------------------------
The timer_* varibales are set by an IRQ in these intervalls. I'm not
sure if the intervalls are correct. The website indicated that tcp_tmr()
should be called every 100ms. Did I forgot a timer?. Every 60s all
*_tmr() functions are called. Is there an order I have to meet?
TIA Gustl
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